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['M', point.x, point.y] : ['L', point.x, point.y];\n  });\n}\n\n// 插值的图形\nfunction getInterpolateShapeAttrs(cfg: ShapeInfo, shapeType: string) {\n  const points = getPathPoints(cfg.points, cfg.connectNulls, cfg.showSinglePoint); // 根据 connectNulls 值处理 points\n  let path = [];\n  each(points, (eachLinePoints) => {\n    const interpolatePoints = getInterpolatePoints(eachLinePoints, shapeType);\n    path = path.concat(getInterpolatePath(interpolatePoints));\n  });\n\n  return {\n    ...getStyle(cfg, true, false, 'lineWidth'),\n    path,\n  };\n}\n\n// step line\neach(['hv', 'vh', 'hvh', 'vhv'], (shapeType) => {\n  registerShape('line', shapeType, {\n    draw(cfg: ShapeInfo, container: IGroup) {\n      const attrs = getInterpolateShapeAttrs(cfg, shapeType);\n      const shape = container.addShape({\n        type: 'path',\n        attrs,\n        name: 'line',\n      });\n\n      return shape;\n    },\n    getMarker(markerCfg: ShapeMarkerCfg) {\n      return getLineMarker(markerCfg, shapeType);\n    },\n  });\n});\n"]}